alt Hacker NewsI have a 600MHz RM7k O2, and my 700MHz R16k Fuel blows it out of the water. The O2 isn't that quiet or that quick even with upgrades!
What SSD are you running? I'm still on 10k SCSI drives selected for the quietness of their bearings.
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Right now I cant get to the machine (off, in the basement) but it is some run-of-the-mill SATA drives using a SATA expansion card.
It works great but I just use it for /opt since I ran out time to move more of the machine into it.
You cant boot off the SSD, so I still use a SCSI but you can replace that too if you boot the SGI off the network.
Silent SGI:
Having gotten rid of the SCSI drives completely w/ the network boot, you can put a modern, more silent, PSU [1] (but hurry, ones w/ enough current on 5V (?) are rare), and then replace the GPU and CPU fans and turn of environmental monitoring.
[1] i had to replace mine; my 500 MHz Fuel is notorious for bad psu
You could use the NVME driver to load the filesystem and boot the kernel diskless...